Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851819 | Photoelectric smoke detector with permanently fixed insect net | Hiroshi Sawa | 1989-07-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851819 | Photoelectric smoke detector with permanently fixed insect net | Hiroshi Sawa | 1989-07-25 |